As in this? We were very interested in seeing this sign in the window of a small market in Foix; Casino is a chain throughout France, or at least in the Southwest. It says "Casino products are made without GMO ingredients - that's our commitment since 1996":

There's a lot on the web about SÚralini's rat experiment. The GMO interests are jumping all over him, and they've managed to co-opt a good part of the European science groups as well because so many of those involved have some ties to GMO-producing companies.